Installation In An Unconditioned Space; Electrical Wiring; Power Wiring - Johnson Controls YORK YMSFXH018BAAK Series Installation Manual

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Horizontal units must be configured for right hand air supply or left hand air
supply. Horizontal drain pan must be located under indoor coil. Failure to
use the drain pan can result in property damage.
Conversion in Horizontal Direction: Horizontal left-hand supply can be changed
to horizontal right-hand supply by removing the indoor coil and reinstalling 180° from
original.

3.4 INSTALLATION IN AN UNCONDITIONED SPACE

IMPORTANT: There are two pairs of coil rails in the air handler for default and counter
flow application. If the air handler is installed in an unconditioned space, the two
unused coil rails should be removed to minimize air handler surface sweating. The coil
rails can be easily removed by taking off the 6 mounting screws from both sides of the
cabinet.

4.0 ELECTRICAL WIRING

Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any
applicable local ordinance.
Disconnect all power to unit before installing or servicing. More than one
disconnect switch may be required to de-energize the equipment. Hazard-
ous voltage can cause severe personal injury or death.

4.1 POWER WIRING

It is important that proper electrical power is available for connection to the unit model
being installed. See the unit nameplate, wiring diagram and electrical data in the
installation instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight
of, and readily accessible to the unit.
• IMPORTANT: After the Electric Heater is installed, units may be equipped with
one, two, or three 30/60 amp. circuit breakers. These breaker(s) protect the internal
wiring in the event of a short circuit and serve as a disconnect. Circuit breakers
installed within the unit do not provide over-current protection of the supply wiring
and therefore may be sized larger than the branch circuit protection.
• Supply circuit power wiring must be 75°C minimum copper conductors only. See
Electrical Data In this section for ampacity, wire size and circuit protector require
ment. Supply circuit protective devices may be either fuses or "HACR" type circuit
breakers.
• Power wiring may be connected to either the right, left side or top. Three 7/8",
1-3/8", 1-3/4" dia. concentric knockouts are provided for connection of power wiring
to unit.
• Power wiring is connected to the power terminal block in unit electric cabinet.
CAUTION
WARNING